diff --git a/docs/development/ui-testids-CN.md b/docs/development/ui-testids-CN.md
index ab6058e28..d7a80ab07 100644
--- a/docs/development/ui-testids-CN.md
+++ b/docs/development/ui-testids-CN.md
@@ -159,6 +159,9 @@
 | 会话菜单按钮 | `nav-session-menu-btn` | 打开行操作菜单。配合 `data-session-id` 使用。 |
 | 会话菜单 | `nav-session-menu` | 单个会话的 portal 菜单。配合 `data-session-id` 使用。 |
 | 会话重命名项 | `nav-session-menu-rename` | 开始重命名会话。 |
+| 会话复制 ID 项 | `nav-session-menu-copy-id` | 复制会话 ID。配合 `data-session-id` 使用。 |
+| 会话定时任务项 | `nav-session-menu-scheduled-jobs` | 打开该会话的定时任务。配合 `data-session-id` 使用。 |
+| 会话归档项 | `nav-session-menu-archive` | 归档会话。配合 `data-session-id` 使用。 |
 | 会话删除项 | `nav-session-menu-delete` | 删除会话。 |
 | 会话列表展开按钮 | `nav-session-list-toggle` | 展开/折叠长会话列表。 |
 
diff --git a/docs/development/ui-testids.md b/docs/development/ui-testids.md
index 5adc253b0..38697873a 100644
--- a/docs/development/ui-testids.md
+++ b/docs/development/ui-testids.md
@@ -160,6 +160,9 @@ Avoid adding IDs to these surfaces unless there is a clear automated workflow.
 | Session menu button | `nav-session-menu-btn` | Opens row action menu. Pair with `data-session-id`. |
 | Session menu | `nav-session-menu` | Portal menu for one session. Pair with `data-session-id`. |
 | Session rename item | `nav-session-menu-rename` | Starts session rename. |
+| Session copy ID item | `nav-session-menu-copy-id` | Copies the session ID. Pair with `data-session-id`. |
+| Session scheduled jobs item | `nav-session-menu-scheduled-jobs` | Opens scheduled jobs for the session. Pair with `data-session-id`. |
+| Session archive item | `nav-session-menu-archive` | Archives the session. Pair with `data-session-id`. |
 | Session delete item | `nav-session-menu-delete` | Deletes session. |
 | Session list toggle | `nav-session-list-toggle` | Expands/collapses long session lists. |
 
diff --git a/src/web-ui/src/app/components/NavPanel/sections/sessions/SessionsSection.tsx b/src/web-ui/src/app/components/NavPanel/sections/sessions/SessionsSection.tsx
index 842dc3ad0..561b6e4ac 100644
--- a/src/web-ui/src/app/components/NavPanel/sections/sessions/SessionsSection.tsx
+++ b/src/web-ui/src/app/components/NavPanel/sections/sessions/SessionsSection.tsx
@@ -7,7 +7,7 @@
 
 import React, { lazy, Suspense, useCallback, useEffect, useMemo, useRef, useState } from 'react';
 import { createPortal } from 'react-dom';
-import { Pencil, Trash2, Check, X, Bot, Code2, ClipboardList, Panda, MoreHorizontal, Loader2, Archive, Clock3 } from 'lucide-react';
+import { Pencil, Trash2, Check, X, Bot, Code2, ClipboardList, Panda, MoreHorizontal, Loader2, Archive, Clock3, Copy } from 'lucide-react';
 import { IconButton, Input, Tooltip } from '@/component-library';
 import { useI18n } from '@/infrastructure/i18n';
 import { flowChatStore } from '../../../../../flow_chat/store/FlowChatStore';
@@ -48,6 +48,8 @@ import type {
 } from '@/flow_chat/utils/backgroundSubagentActivity';
 import { computeFixedPopoverPosition } from '@/shared/utils/fixedPopoverViewport';
 import { confirmWarning } from '@/component-library/components/ConfirmDialog/confirmService';
+import { notificationService } from '@/shared/notification-system';
+import { copyTextToClipboard } from '@/shared/utils/textSelection';
 import { scheduleAfterStartupPaint, scheduleAfterStartupSignal } from '@/shared/utils/startupTaskScheduling';
 import {
   SESSION_METADATA_DEFERRED_FALLBACK_MS,
@@ -774,7 +776,7 @@ const SessionsSection: React.FC<SessionsSectionProps> = ({
       }
       const btn = e.currentTarget as HTMLElement;
       const rect = btn.getBoundingClientRect();
-      const { top, left } = computeFixedPopoverPosition(rect, 160, 96, 4, 8);
+      const { top, left } = computeFixedPopoverPosition(rect, 160, 120, 4, 8);
       setSessionMenuPosition({ top, left });
       setOpenMenuSessionId(sessionId);
     },
@@ -811,6 +813,19 @@ const SessionsSection: React.FC<SessionsSectionProps> = ({
     [t]
   );
 
+  const handleCopySessionId = useCallback(
+    async (e: React.MouseEvent, sessionId: string) => {
+      e.stopPropagation();
+      const copied = await copyTextToClipboard(sessionId);
+      if (copied) {
+        notificationService.success(t('nav.sessions.copySessionIdSuccess'), { duration: 2000 });
+      } else {
+        notificationService.error(t('nav.sessions.copySessionIdFailed'), { duration: 3000 });
+      }
+    },
+    [t]
+  );
+
   const handleStartEdit = useCallback(
     (e: React.MouseEvent, session: Session) => {
       e.stopPropagation();
@@ -1166,6 +1181,8 @@ const SessionsSection: React.FC<SessionsSectionProps> = ({
                       ref={openMenuSessionId === session.sessionId ? sessionMenuAnchorRef : undefined}
                       className={`bitfun-nav-panel__inline-item-action-btn${openMenuSessionId === session.sessionId ? ' is-open' : ''}`}
                       onClick={e => handleMenuOpen(e, session.sessionId)}
+                      data-testid="nav-session-menu-btn"
+                      data-session-id={session.sessionId}
                     >
                       <MoreHorizontal size="var(--bitfun-nav-row-action-icon-size)" />
                     </button>
@@ -1176,15 +1193,29 @@ const SessionsSection: React.FC<SessionsSectionProps> = ({
                       className="bitfun-nav-panel__inline-item-menu-popover"
                       role="menu"
                       style={{ top: `${sessionMenuPosition.top}px`, left: `${sessionMenuPosition.left}px` }}
+                      data-testid="nav-session-menu"
+                      data-session-id={session.sessionId}
                     >
                       <button
                         type="button"
                         className="bitfun-nav-panel__inline-item-menu-item"
                         onClick={e => { setOpenMenuSessionId(null); handleStartEdit(e, session); }}
+                        data-testid="nav-session-menu-rename"
+                        data-session-id={session.sessionId}
                       >
                         <Pencil size={13} />
                         <span>{t('nav.sessions.rename')}</span>
                       </button>
+                      <button
+                        type="button"
+                        className="bitfun-nav-panel__inline-item-menu-item"
+                        onClick={e => { setOpenMenuSessionId(null); void handleCopySessionId(e, session.sessionId); }}
+                        data-testid="nav-session-menu-copy-id"
+                        data-session-id={session.sessionId}
+                      >
+                        <Copy size={13} />
+                        <span>{t('nav.sessions.copySessionId')}</span>
+                      </button>
                       <button
                         type="button"
                         className="bitfun-nav-panel__inline-item-menu-item"
@@ -1194,6 +1225,8 @@ const SessionsSection: React.FC<SessionsSectionProps> = ({
                           setScheduledJobsSessionId(session.sessionId);
                         }}
                         disabled={!workspacePath}
+                        data-testid="nav-session-menu-scheduled-jobs"
+                        data-session-id={session.sessionId}
                       >
                         <Clock3 size={13} />
                         <span>{t('nav.scheduledJobs.open')}</span>
@@ -1202,6 +1235,8 @@ const SessionsSection: React.FC<SessionsSectionProps> = ({
                         type="button"
                         className="bitfun-nav-panel__inline-item-menu-item"
                         onClick={e => { setOpenMenuSessionId(null); void handleArchive(e, session.sessionId); }}
+                        data-testid="nav-session-menu-archive"
+                        data-session-id={session.sessionId}
                       >
                         <Archive size={13} />
                         <span>{t('nav.sessions.archive')}</span>
@@ -1210,6 +1245,8 @@ const SessionsSection: React.FC<SessionsSectionProps> = ({
                         type="button"
                         className="bitfun-nav-panel__inline-item-menu-item is-danger"
                         onClick={e => { setOpenMenuSessionId(null); void handleDelete(e, session.sessionId); }}
+                        data-testid="nav-session-menu-delete"
+                        data-session-id={session.sessionId}
                       >
                         <Trash2 size={13} />
                         <span>{t('nav.sessions.delete')}</span>
diff --git a/src/web-ui/src/flow_chat/components/ChatInput.tsx b/src/web-ui/src/flow_chat/components/ChatInput.tsx
index b5685a4a9..5926d958c 100644
--- a/src/web-ui/src/flow_chat/components/ChatInput.tsx
+++ b/src/web-ui/src/flow_chat/components/ChatInput.tsx
@@ -29,7 +29,7 @@ import type { FileContext, DirectoryContext, ImageContext } from '@/types/contex
 import { SmartRecommendations } from './smart-recommendations';
 import { useCurrentWorkspace, useWorkspaceContext } from '@/infrastructure/contexts/WorkspaceContext';
 import { createImageContextFromFile, createImageContextFromClipboard } from '../utils/imageUtils';
-import { isSlashCommand, stripSlashCommand } from '../utils/slashCommand';
+import { getSlashCommandPickerQuery, isSlashCommand, stripSlashCommand } from '../utils/slashCommand';
 import { notificationService } from '@/shared/notification-system';
 import { inputReducer, initialInputState } from '../reducers/inputReducer';
 import { modeReducer, initialModeState } from '../reducers/modeReducer';
@@ -1828,7 +1828,8 @@ export const ChatInput: React.FC<ChatInputProps> = ({
     if (text.startsWith('/')) {
       const afterSlash = text.slice(1);
       const hasWhitespace = /\s/.test(afterSlash);
-      const query = afterSlash.trimStart().split(/\s+/, 1)[0]?.toLowerCase?.() ?? '';
+      const pickerQuery = getSlashCommandPickerQuery(text);
+      const query = pickerQuery ?? afterSlash.trimStart().split(/\s+/, 1)[0]?.toLowerCase?.() ?? '';
       const matchedMcpPrompt = localSlashCommandsEnabled
         ? resolveTypedMcpPromptCommand(text)
         : null;
@@ -1852,7 +1853,7 @@ export const ChatInput: React.FC<ChatInputProps> = ({
         // Only show the picker for "/..." patterns that are plausibly a command (/ or /b... /d...).
         // Once the user types a space (starts composing the real question), stop showing the picker
         // so Enter can submit "/btw ..." or "/DeepReview ..." instead of selecting from the picker.
-        if (!hasWhitespace && (query === '' || query.startsWith('b') || query.startsWith('d') || query.startsWith('g') || query.startsWith('u'))) {
+        if (pickerQuery !== null && (query === '' || query.startsWith('b') || query.startsWith('d') || query.startsWith('g') || query.startsWith('u'))) {
           setSlashCommandState({
             isActive: true,
             kind: 'actions',
@@ -1866,7 +1867,7 @@ export const ChatInput: React.FC<ChatInputProps> = ({
       }
 
       // When idle, keep the picker for mode switching, but don't interfere with executable slash commands.
-      if (!isBtwCommand && !isGoalCommand && !isCompactCommand && !isUsageCommand && !isDeepReviewCommand && !matchedMcpPrompt) {
+      if (pickerQuery !== null && !isBtwCommand && !isGoalCommand && !isCompactCommand && !isUsageCommand && !isDeepReviewCommand && !matchedMcpPrompt) {
         setSlashCommandState({
           isActive: true,
           kind: 'all',
@@ -2985,11 +2986,6 @@ export const ChatInput: React.FC<ChatInputProps> = ({
             getRichTextInlineTriggerController()?.closeInlineTrigger?.();
           }
           setSlashCommandState({ isActive: false, kind: 'modes', query: '', selectedIndex: 0 });
-
-          // For mode switching picker, "/" is just a trigger and should be cleared on cancel.
-          if (kind !== 'actions' && kind !== 'skills') {
-            dispatchInput({ type: 'CLEAR_VALUE' });
-          }
           return;
         }
         
diff --git a/src/web-ui/src/flow_chat/components/RichTextInput.test.tsx b/src/web-ui/src/flow_chat/components/RichTextInput.test.tsx
index 632d52739..bae4b5eb7 100644
--- a/src/web-ui/src/flow_chat/components/RichTextInput.test.tsx
+++ b/src/web-ui/src/flow_chat/components/RichTextInput.test.tsx
@@ -168,6 +168,28 @@ describeWithJsdom('RichTextInput external sync', () => {
     expect(editor.firstChild).toBe(originalTextNode);
   });
 
+  it('preserves trailing spaces emitted by user input', async () => {
+    const onChange = vi.fn();
+
+    await act(async () => {
+      root.render(
+        <RichTextInput
+          value=""
+          onChange={onChange}
+          contexts={emptyContexts}
+          onRemoveContext={() => {}}
+        />
+      );
+    });
+
+    const editor = container.querySelector('.rich-text-input');
+    expect(editor).toBeInstanceOf(HTMLDivElement);
+
+    await updateEditorText(editor as HTMLDivElement, '/b ');
+
+    expect(onChange).toHaveBeenLastCalledWith('/b ', emptyContexts);
+  });
+
   it('replaces the DOM node when value changes externally', async () => {
     const harnessRef = createRef<HarnessHandle>();
     const editor = await renderHarness(harnessRef);
diff --git a/src/web-ui/src/flow_chat/components/RichTextInput.tsx b/src/web-ui/src/flow_chat/components/RichTextInput.tsx
index 82deea447..fcd570fee 100644
--- a/src/web-ui/src/flow_chat/components/RichTextInput.tsx
+++ b/src/web-ui/src/flow_chat/components/RichTextInput.tsx
@@ -64,6 +64,10 @@ function isWhitespaceCharacter(char: string | undefined): boolean {
   return !char || /\s/.test(char);
 }
 
+function trimEdgeLineBreaks(text: string): string {
+  return text.replace(/^[\r\n]+/, '').replace(/[\r\n]+$/, '');
+}
+
 function getContextDisplayName(context: ContextItem): string {
   switch (context.type) {
     case 'file': return context.fileName;
@@ -448,7 +452,11 @@ export const RichTextInput = React.forwardRef<HTMLDivElement, RichTextInputProps
     };
     
     internalRef.current.childNodes.forEach(traverse);
-    return sanitizeText(text).trim();
+    const sanitizedText = sanitizeText(text);
+    const extractedText = sanitizedText.startsWith('/')
+      ? trimEdgeLineBreaks(sanitizedText)
+      : sanitizedText.trim();
+    return extractedText;
   }, [internalRef]);
 
   // Detect @ mention plus inline / and $ triggers near the caret.
diff --git a/src/web-ui/src/flow_chat/services/flow-chat-manager/SessionModule.test.ts b/src/web-ui/src/flow_chat/services/flow-chat-manager/SessionModule.test.ts
index 2be76d567..3fc634765 100644
--- a/src/web-ui/src/flow_chat/services/flow-chat-manager/SessionModule.test.ts
+++ b/src/web-ui/src/flow_chat/services/flow-chat-manager/SessionModule.test.ts
@@ -1,6 +1,7 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 import {
   archiveChatSession,
+  createChatSession,
   deleteChatSession,
   ensureBackendSession,
   preloadHistoricalSessionForOpen,
@@ -151,6 +152,36 @@ function createContext(
   };
   const flowChatStore = {
     getState: () => state,
+    createSession: vi.fn((
+      sessionId: string,
+      config?: Record<string, unknown>,
+      _unused?: unknown,
+      title?: string,
+      _maxContextTokens?: number,
+      agentType?: string,
+      workspacePath?: string,
+      remoteConnectionId?: string,
+      remoteSshHost?: string,
+    ) => {
+      const nextSession = createSession({
+        sessionId,
+        title: title ?? sessionId,
+        isHistorical: false,
+        historyState: 'ready',
+        config: {
+          agentType: agentType ?? (config?.agentType as string | undefined) ?? 'agentic',
+        },
+        mode: agentType ?? 'agentic',
+        workspacePath: workspacePath ?? (config?.workspacePath as string | undefined) ?? session.workspacePath,
+        remoteConnectionId,
+        remoteSshHost,
+      });
+      state = {
+        ...state,
+        sessions: new Map(state.sessions).set(sessionId, nextSession),
+        activeSessionId: sessionId,
+      };
+    }),
     switchSession: vi.fn((sessionId: string) => {
       state = { ...state, activeSessionId: sessionId };
     }),
@@ -247,6 +278,45 @@ describe('resolveAgentTypeForSessionCreation', () => {
   });
 });
 
+describe('createChatSession', () => {
+  afterEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('dedupes concurrent creates before model config loading resolves', async () => {
+    // This keeps the first create suspended in the model config path while the
+    // second create enters with the same creation key.
+    const modelConfig = createDeferred<Record<string, unknown>>();
+    configApiMocks.getConfig.mockImplementation(async (key: string) => {
+      if (key === 'chat.default_mode') {
+        return null;
+      }
+      await modelConfig.promise;
+      return key === 'ai.models' ? [] : {};
+    });
+    agentApiMocks.getAvailableModes.mockResolvedValue([{ id: 'agentic' }]);
+    agentApiMocks.createSession.mockResolvedValue({ sessionId: 'created-1' });
+
+    const { context } = createContext(createSession({
+      workspacePath: '/home/wsp/projects/Test',
+    }));
+
+    const firstCreate = createChatSession(context, { workspacePath: '/home/wsp/projects/Test' }, 'agentic');
+    const secondCreate = createChatSession(context, { workspacePath: '/home/wsp/projects/Test' }, 'agentic');
+
+    await Promise.resolve();
+    expect(agentApiMocks.createSession).not.toHaveBeenCalled();
+
+    modelConfig.resolve({});
+    await expect(Promise.all([firstCreate, secondCreate])).resolves.toEqual([
+      'created-1',
+      'created-1',
+    ]);
+
+    expect(agentApiMocks.createSession).toHaveBeenCalledTimes(1);
+  });
+});
+
 describe('SessionModule historical session coordination', () => {
   beforeEach(() => {
     vi.useFakeTimers();
diff --git a/src/web-ui/src/flow_chat/services/flow-chat-manager/SessionModule.ts b/src/web-ui/src/flow_chat/services/flow-chat-manager/SessionModule.ts
index b324177af..7dcf6d90a 100644
--- a/src/web-ui/src/flow_chat/services/flow-chat-manager/SessionModule.ts
+++ b/src/web-ui/src/flow_chat/services/flow-chat-manager/SessionModule.ts
@@ -548,31 +548,33 @@ export async function createChatSession(
       return pendingCreation;
     }
 
-    const sameModeCount = getNextDefaultSessionTitleCount(
-      context.flowChatStore.getState().sessions.values(),
-      {
-        mode: sessionMode,
-        workspaceId: workspace?.id,
-        workspacePath,
-        remoteConnectionId,
-        remoteSshHost,
-      },
-    );
-    const titleDescriptor = createDefaultSessionTitleDescriptor(
-      sessionMode,
-      sameModeCount,
-      (key, options) => i18nService.t(key, options),
-    );
-    const sessionName = titleDescriptor.text;
-    
-    const maxContextTokens = await getModelMaxTokens(config.modelName, agentType);
+    // Register the pending promise before any async work below. Remote workspace
+    // activation can rerun initialization while model config is still loading.
+    const createPromise = Promise.resolve().then(async () => {
+      const sameModeCount = getNextDefaultSessionTitleCount(
+        context.flowChatStore.getState().sessions.values(),
+        {
+          mode: sessionMode,
+          workspaceId: workspace?.id,
+          workspacePath,
+          remoteConnectionId,
+          remoteSshHost,
+        },
+      );
+      const titleDescriptor = createDefaultSessionTitleDescriptor(
+        sessionMode,
+        sameModeCount,
+        (key, options) => i18nService.t(key, options),
+      );
+      const sessionName = titleDescriptor.text;
+      
+      const maxContextTokens = await getModelMaxTokens(config.modelName, agentType);
 
-    const mergedConfig: SessionConfig = {
-      ...config,
-      workspaceId: workspace?.id ?? config.workspaceId,
-    };
+      const mergedConfig: SessionConfig = {
+        ...config,
+        workspaceId: workspace?.id ?? config.workspaceId,
+      };
 
-    const createPromise = (async () => {
       const response = await agentAPI.createSession({
         sessionName,
         agentType,
@@ -606,7 +608,7 @@ export async function createChatSession(
       );
 
       return response.sessionId;
-    })();
+    });
 
     pendingSessionCreations.set(creationKey, createPromise);
     try {
diff --git a/src/web-ui/src/flow_chat/utils/sessionOrdering.test.ts b/src/web-ui/src/flow_chat/utils/sessionOrdering.test.ts
index 77384b0d2..8c2df084d 100644
--- a/src/web-ui/src/flow_chat/utils/sessionOrdering.test.ts
+++ b/src/web-ui/src/flow_chat/utils/sessionOrdering.test.ts
@@ -131,4 +131,22 @@ describe('sessionOrdering', () => {
       )
     ).toBe(true);
   });
+
+  it('remote SSH: matches persisted metadata that only has workspaceHostname', () => {
+    const session = {
+      workspacePath: '/home/u/project-a',
+      remoteConnectionId: undefined,
+      remoteSshHost: undefined,
+      workspaceHostname: 'myserver.example.com',
+    };
+
+    expect(
+      sessionBelongsToWorkspaceNavRow(
+        session,
+        '/home/u/project-a',
+        'ssh-user@myserver.example.com:22',
+        undefined
+      )
+    ).toBe(true);
+  });
 });
diff --git a/src/web-ui/src/flow_chat/utils/sessionOrdering.ts b/src/web-ui/src/flow_chat/utils/sessionOrdering.ts
index 3646ac945..e8da82d77 100644
--- a/src/web-ui/src/flow_chat/utils/sessionOrdering.ts
+++ b/src/web-ui/src/flow_chat/utils/sessionOrdering.ts
@@ -25,7 +25,9 @@ function effectiveWorkspaceSshHost(
  * We must never treat "same host" as sufficient: two tabs to the same server at `/a` vs `/b` are distinct.
  */
 export function sessionBelongsToWorkspaceNavRow(
-  session: Pick<Session, 'workspacePath' | 'remoteConnectionId' | 'remoteSshHost'>,
+  session: Pick<Session, 'workspacePath' | 'remoteConnectionId' | 'remoteSshHost'> & {
+    workspaceHostname?: string | null;
+  },
   workspacePath: string,
   remoteConnectionId?: string | null,
   remoteSshHost?: string | null
@@ -38,7 +40,10 @@ export function sessionBelongsToWorkspaceNavRow(
   const wsConn = remoteConnectionId?.trim() ?? '';
   const sessConn = session.remoteConnectionId?.trim() ?? '';
   const wsHostEff = effectiveWorkspaceSshHost(remoteSshHost, remoteConnectionId);
-  const sessHost = session.remoteSshHost?.trim().toLowerCase() ?? '';
+  const sessHost =
+    session.remoteSshHost?.trim().toLowerCase() ||
+    session.workspaceHostname?.trim().toLowerCase() ||
+    '';
   const sessConnHost = hostFromSshConnectionId(sessConn);
   const wsConnHost = hostFromSshConnectionId(wsConn);
 
diff --git a/src/web-ui/src/flow_chat/utils/slashCommand.test.ts b/src/web-ui/src/flow_chat/utils/slashCommand.test.ts
index 59a64dd32..adca898be 100644
--- a/src/web-ui/src/flow_chat/utils/slashCommand.test.ts
+++ b/src/web-ui/src/flow_chat/utils/slashCommand.test.ts
@@ -1,6 +1,8 @@
 import { describe, expect, it } from 'vitest';
 
 import {
+  getSlashCommandPickerQuery,
+  isSlashCommandPickerQuery,
   isSlashCommand,
   matchesSlashCommand,
   stripSlashCommand,
@@ -48,6 +50,34 @@ describe('isSlashCommand', () => {
   });
 });
 
+describe('isSlashCommandPickerQuery', () => {
+  it('allows single-token command picker queries', () => {
+    expect(isSlashCommandPickerQuery('')).toBe(true);
+    expect(isSlashCommandPickerQuery('goal')).toBe(true);
+    expect(isSlashCommandPickerQuery('mcp:foo-bar')).toBe(true);
+  });
+
+  it('rejects path-like queries with another slash', () => {
+    expect(isSlashCommandPickerQuery('users/alice')).toBe(false);
+    expect(isSlashCommandPickerQuery('foo/bar/baz')).toBe(false);
+  });
+});
+
+describe('getSlashCommandPickerQuery', () => {
+  it('returns a lowercase query for active picker text', () => {
+    expect(getSlashCommandPickerQuery('/')).toBe('');
+    expect(getSlashCommandPickerQuery('/Goal')).toBe('goal');
+    expect(getSlashCommandPickerQuery('/mcp:foo-bar')).toBe('mcp:foo-bar');
+  });
+
+  it('closes the picker once the slash token is no longer active', () => {
+    expect(getSlashCommandPickerQuery('/goal ')).toBeNull();
+    expect(getSlashCommandPickerQuery('/goal focus')).toBeNull();
+    expect(getSlashCommandPickerQuery('/users/alice')).toBeNull();
+    expect(getSlashCommandPickerQuery('hello /goal')).toBeNull();
+  });
+});
+
 describe('stripSlashCommand', () => {
   it('removes the command token and immediate whitespace', () => {
     expect(stripSlashCommand('/btw question?', '/btw')).toBe('question?');
diff --git a/src/web-ui/src/flow_chat/utils/slashCommand.ts b/src/web-ui/src/flow_chat/utils/slashCommand.ts
index e485c03ed..4d90d6737 100644
--- a/src/web-ui/src/flow_chat/utils/slashCommand.ts
+++ b/src/web-ui/src/flow_chat/utils/slashCommand.ts
@@ -1,5 +1,22 @@
 const COMMAND_BOUNDARY_RE = /^(\/[A-Za-z][\w:-]*)(?=\s|$)/;
 
+export function isSlashCommandPickerQuery(query: string): boolean {
+  return typeof query === 'string' && !query.includes('/');
+}
+
+export function getSlashCommandPickerQuery(text: string): string | null {
+  if (typeof text !== 'string' || !text.startsWith('/')) {
+    return null;
+  }
+
+  const query = text.slice(1);
+  if (/\s/.test(query) || !isSlashCommandPickerQuery(query)) {
+    return null;
+  }
+
+  return query.toLowerCase();
+}
+
 export function matchesSlashCommand(text: string): string | null {
   if (typeof text !== 'string' || text.length === 0 || !text.startsWith('/')) {
     return null;
diff --git a/src/web-ui/src/locales/en-US/common.json b/src/web-ui/src/locales/en-US/common.json
index 9e8996d1a..0a84e4d03 100644
--- a/src/web-ui/src/locales/en-US/common.json
+++ b/src/web-ui/src/locales/en-US/common.json
@@ -165,6 +165,9 @@
       "modeCowork": "Cowork",
       "noSessions": "No sessions",
       "rename": "Rename",
+      "copySessionId": "Copy ID",
+      "copySessionIdSuccess": "Session ID copied",
+      "copySessionIdFailed": "Failed to copy session ID",
       "delete": "Delete",
       "confirmEdit": "Confirm",
       "cancelEdit": "Cancel",
diff --git a/src/web-ui/src/locales/zh-CN/common.json b/src/web-ui/src/locales/zh-CN/common.json
index 868643cc9..dd365fd65 100644
--- a/src/web-ui/src/locales/zh-CN/common.json
+++ b/src/web-ui/src/locales/zh-CN/common.json
@@ -165,6 +165,9 @@
       "modeCowork": "Cowork",
       "noSessions": "暂无会话",
       "rename": "重命名",
+      "copySessionId": "复制 ID",
+      "copySessionIdSuccess": "已复制会话 ID",
+      "copySessionIdFailed": "复制会话 ID 失败",
       "delete": "删除",
       "confirmEdit": "确认",
       "cancelEdit": "取消",
diff --git a/src/web-ui/src/locales/zh-TW/common.json b/src/web-ui/src/locales/zh-TW/common.json
index f7b5ee44b..9469364e5 100644
--- a/src/web-ui/src/locales/zh-TW/common.json
+++ b/src/web-ui/src/locales/zh-TW/common.json
@@ -165,6 +165,9 @@
       "modeCowork": "Cowork",
       "noSessions": "暫無會話",
       "rename": "重新命名",
+      "copySessionId": "複製 ID",
+      "copySessionIdSuccess": "已複製會話 ID",
+      "copySessionIdFailed": "複製會話 ID 失敗",
       "delete": "刪除",
       "confirmEdit": "確認",
       "cancelEdit": "取消",